Fellaini conceded possession all too cheaply to Davis, who raced through the middle and fed Shane Long. The former Hull forward's cross led Tadic to strike on goal, a deflection ushered Pelle through and he fired the equaliser.

Long blasted high and wide in a glorious opening after Mane beat Evans to Tadic's cross with an acrobatic leap.

Van Gaal then hauled McNair off in favour of Ander Herrera, forced into a tactical reshuffle as early as the 39th minute.